# Service bulletin 37666.1.0

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11031104
- Published by NHTSA: 2026\-04\-07
- Manufacturer's number: 37666.1.0
- Manufacturer's date: 2026\-03\-19
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

This is a TJ \- text plus 1 pdf \- If the Check Engine Light is on and DTC ECM P044100 is set, please follow the advice under "Service". Do not start by replacing parts.\&\#13; Improved software is introduced with version 5.0.5.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031104-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031104-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Fuel system

## Trouble codes named

P0441

## Vehicles listed

- 2025 to 2026 VOLVO XC40MHEV

## Other bulletins for the same vehicles and component

- [37236.5.1](/bulletins/11031097.md), 2026-04-07, Service bulletin: FUEL/PROPULSION SYSTEM; UNKNOWN OR OTHER. This is a Technical Journal: Text only no attachments \- CEL and DTC ECM P04F000. New ECM software has been released
- [TJ37521\-1](/bulletins/11026733.md), 2025-12-22, Service bulletin: FUEL/PROPULSION SYSTEM. This is a Technical Journal \- If a customer experiences a "Propulsion System Service Required" message in the DIM, and the DTC IEM P0CBC62 is stored, please follow the advice under "Service".
- [TJ37521.1.0\-2025\-10\-14](/bulletins/11026732.md), 2025-12-22, Service bulletin: FUEL/PROPULSION SYSTEM. This is a Technical Journal \- If a customer experiences a "Propulsion System Service Required" message in the DIM, and the DTC IEM P0CBC62 is stored, please follow the advice under "Service".
- [37236](/bulletins/11021931.md), 2025-08-18, Service bulletin: UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. This is a Technical Journal: CEL and DTC ECM P04F000. New ECM software has been released
- [37236](/bulletins/11020532.md), 2025-07-09, Service bulletin: UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. This is a Technical Journal: CEL and DTC ECM P04F000. New ECM software has been released
- [37236](/bulletins/11016009.md), 2025-03-27, Service bulletin: UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. This is a Technical Journal: CEL and DTC ECM P04F000. New ECM software has been released

JSON: [/v1/bulletins/11031104](/v1/bulletins/11031104)

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